Deep-well packer.



J. C. STINSON.

DEEP WELL PACKER.

APPLICATION FILED MAR. 29, 1915.

1,177,971 Patented Apr. 4, 1916.

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THE COLUMBIA PLANOGRAPH co., WASHINGTON. Dv C.

STATES PATENT OFFICE.

JAMES C. STINSON, 0F BRADFORD, PENNSYLVANIA;

DEEP-WELL PAGKER.

lVell Packers, of which the following is a specification.

This invention relates to deep-well packers, and has for its object theprovision of a deep-well packer in which the construction and operationof the devices for this purpose will be simplified, while the efliciencyof the same will be increased.

The invention is illustrated in the accompanying drawings and consistsin certain novel features which will be hereinafter first fullydescribed and then more particularly pointed out in the appended claims.

In the drawings: Figure 1 is an elevation of a deep-well packerembodying my present improvements; and Fig. 2 is a vertical section ofthe same.

In the accompanying drawings, the reference numeral 1 indicates thepacker which is the usual elastic cylinder or sleeve fitted around thecasing 2 between an upper fixed collar 3 thereon and a lower looselymounted collar or expander 4. The expander is fitted upon the casing incontact with the lower end of the packer and has its lower end tapered,as indicated at 5, whereby it may be engaged by the upper ends of theslips 6 so as to throw the said slips outwardly into engagement with thewall of the well and thereby anchor the slips and slip cage so thatfurther downward movement of the casing will expand the packer tightlyagainst the wall of the well in the usual manner.

In carrying out the present invention, the slip cage 7 is provided atdiametrically opposite points with bayonet slots 8 having long verticalbranches and short horizontal branches at their upper ends, and thecasing is provided at diametrically opposite points with pins 9 adaptedto engage said bayonet slots, it being readily understood that the pinsare inserted through the slots into the casing after the cage has beenplaced in position upon the casing. The cage is also provided atdiametrically opposite points with openings 10, said openings beinglocated between the bayonet slots and approximately in the horizontalplane of the lower ends of said slots. The casing is also provided withdiametrically opposite openings which reg- I Specification of LettersPatent. Patented Aprp4, 1916 Application fi1ed'March29, 1915. Serial No.17,745.

ister with the said openings 10 and receive the ends of a telescopic oro'ther sustaining pin 11 on a packerdisk 12. e 1

In the .upper end of the slip cage 7,1

form, notches or recesses 13 which receive the lower ends of the slips 6and leaf springs 1 1 are fitted against the outer surfaces of the cageand the slips so as to bridge the joint between them and have theirupper and lower ends respectively secured to the slips and the cage. Theslips are thus normally held to the casing but areyieldably mounted sothat they may be forced out-- wardly into engagement with the wall ofthe well so as to anchor the device, and to increase the efliciency andcertainty of the anchoring'operation the upper ends of the slips ontheir outer faces are preferably serrated, as indicated at 15. It willbe readily noted that the slips are reduced in width below the upperserrated portions thereof, and these reduced portions are engaged by thelateral lugs or lips 16 on the sides of the bowed leaf springs 17 nearthe upper ends of the saidsprings. The lower ends of these springs 17are rigidly secured to the slip cage 7, as clearly shown, and theintermediate portions thereof are bowed sufficiently tofrictionallyengage the wall of the well and thereby hold the cage against downwardmovement after it has been released from the casing.

It will be readily seen from the foregoing description, taken inconnection with the accompanying drawings, that I have provided a packerwhich may be utilized as a disk packer or as a hook packer.

When the device is utilized as a disk packer, the pins 11 of the disk 12are engaged in the registering openings of the casing and the cage andthe pins 9 on the casing are located at the upper ends of the bayonetslots and immediately over the vertical portions of said slots. When thedevice has reached the point at which it is to be anchored, a weight isdropped through the casing in the usual manner so as to-break or releasethe disk whereupon the casing, being freed of the cage, will movedownwardly relative to the cage so that the lower tapered end of theexpander 4 will be carried down within the upper ends of the slips andforce the same outwardly into the wall of the well thereby anchoring theslips and the slip cage so that the continued downward movement of thecasing will cause the fixed collar Copies of this patent may be obtainedfor five cents each, by addressing the .Gomniissioner of, 2mm,

' Washington-,DL'C.

3 to compress the packer between itself and the expander ring orcollarin the usual manner. The vertical portion of-the slots 8 should belong enough to permit the cQmplete radial expansion of the packer beforefurther downward novement ofthe casing and the pins 9 aredisposed at theclosed ends of the horizontal portions of the bayonet slots 8 asindicated in Fig. 1. Then, when the device reaches the point where it isto be anchored, the casing is partly rotated so as to bring the pins 9over the vertical portions of the bayonet slots whereby the operationpreviously described may be performed.

It will be readily seen that I have provided a device which isexceedingly simple in the construction and arrangement of its parts andis not liable to get out of order. The slips are held to the casing. andto the expander ring by two sets of springs so thattlie engagement ofthe slips in the wall of the well before the desired point has beenreached is not apt to occur. The springs 14 which connect the slips andthe cage are disposed under and'protected by the bowed springs and are,therefore, not liable to be injured in the descent of the device.Moreover, the strain upon the bowed springs is reduced inasmuch as theymay be bowed to a greater extent and are not called upon to exert thesame holding force upon the slips. At the same time, the compression ofthe bowed springs tends to preventlateral movement of the slipstransversely to the springs and thereby serves to hold the slips intheir properoperative positions. Having thus described the invention,what is'claimed asnew is 1. Ina well packer, the combinationof a slipcage, slips disposed at the upper end" of the, cage,- and=leaf springshaving their upper ends secured to the outer surfaces of the slipsandtheir lower ends secured to. the outer surface ofthe cage.

: 2.111 a well packer, the combinati'on of' a slip cage, slips disposedat the upper. end.

of the cage, leaf springs secured. to the cage and the respective slips,iandbowed springs secured to the cage andiprojecting upwardly therefromand having their upper ends pro;

vided with lateral lipsengagingthefsides ofthe slips. 1 V

3. In a well packer; the combination of a slip cage, slips mounted onthe upper end of the cage for relative swinging movement, and bowedsprings secured to the cage and having their upper ends provided withlateral lips engaging the side edges: of the slips.

4. In a well packer, thecoinbination of a slip cage having recesses inits upper edge,

slips having their lower ends fitted in said.

recesses, springs securedto the cage and the slips, and other springssecured to the cage over the first-mentioned springs and having theirupper ends freely engaging the slips. 7

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES C. STINSON. [Ls] lVitnessesz- JAMES Gnonen, JOHN Brno;

